SE0302567D0 - Method and arrangement for oxygen delignification of cellulose pulp - Google Patents

Method and arrangement for oxygen delignification of cellulose pulp

Info

Publication number
SE0302567D0
SE0302567D0 SE0302567A SE0302567A SE0302567D0 SE 0302567 D0 SE0302567 D0 SE 0302567D0 SE 0302567 A SE0302567 A SE 0302567A SE 0302567 A SE0302567 A SE 0302567A SE 0302567 D0 SE0302567 D0 SE 0302567D0
Authority
SE
Sweden
Prior art keywords
oxygen delignification
arrangement
cellulose pulp
bleaching
bleachability
Prior art date
Application number
SE0302567A
Other languages
Swedish (sv)
Other versions
SE525773C2 (en
SE0302567L (en
Inventor
Martin Ragnar
Original Assignee
Kvaerner Pulping Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE0302567A priority Critical patent/SE525773C2/en
Publication of SE0302567D0 publication Critical patent/SE0302567D0/en
Priority to US10/939,616 priority patent/US7156952B2/en
Priority to FI20041208A priority patent/FI20041208A/en
Publication of SE0302567L publication Critical patent/SE0302567L/en
Publication of SE525773C2 publication Critical patent/SE525773C2/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Abstract

The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an optimal predetermined end-pH is obtained. This provides advantages in the subsequent bleaching since the bleachability is substantially improved in the form of reduced need for bleaching chemicals.
SE0302567A 2003-09-24 2003-09-24 Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase SE525773C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE0302567A SE525773C2 (en) 2003-09-24 2003-09-24 Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase
US10/939,616 US7156952B2 (en) 2003-09-24 2004-09-13 Method and arrangement for oxygen delignification of cellulose pulp
FI20041208A FI20041208A (en) 2003-09-24 2004-09-17 Method and arrangement for oxygen delignification of cellulosic pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0302567A SE525773C2 (en) 2003-09-24 2003-09-24 Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase

Publications (3)

Publication Number Publication Date
SE0302567D0 true SE0302567D0 (en) 2003-09-24
SE0302567L SE0302567L (en) 2005-03-25
SE525773C2 SE525773C2 (en) 2005-04-26

Family

ID=29246976

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0302567A SE525773C2 (en) 2003-09-24 2003-09-24 Method and arrangement for oxygen delignification of cellulose pulp with pH control in the final phase

Country Status (3)

Country Link
US (1) US7156952B2 (en)
FI (1) FI20041208A (en)
SE (1) SE525773C2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE522593C2 (en) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech Oxygen gas delignification system and method of pulp of lignocellulosic material
CN1886427B (en) 2003-11-28 2012-05-23 伊士曼化工公司 Cellulose interpolymers and method of oxidation
NZ565629A (en) * 2005-07-19 2011-06-30 Inbicon As Method and apparatus for conversion of cellulosic material to ethanol
WO2008106083A2 (en) * 2007-02-26 2008-09-04 Andritz Inc. Methods and systems for the use of recycled filtrate in bleaching pulp
US20160002858A1 (en) * 2014-07-03 2016-01-07 Linde Aktiengesellschaft Methods for the oxygen-based delignification of pulp
EP3337925A4 (en) * 2015-08-19 2018-12-05 Godavari Biorefineries Ltd. A process for producing cellulose with low impurities from sugarcane bagasse
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp
SE544255C2 (en) * 2020-09-03 2022-03-15 Valmet Oy System for producing cellulose pulp and method for controlling such a system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE355614B (en) * 1970-05-13 1973-04-30 Mo Och Domsjoe Ab
US4198266A (en) * 1977-10-12 1980-04-15 Airco, Inc. Oxygen delignification of wood pulp
US4431480A (en) 1981-10-27 1984-02-14 The Black Clawson Company Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction
US5460696A (en) * 1993-08-12 1995-10-24 The Boc Group, Inc. Oxygen delignification method incorporating wood pulp mixing apparatus
US6153300A (en) * 1994-04-18 2000-11-28 Ahlstrom Machinery, Inc. Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals
DE69619689D1 (en) * 1995-12-07 2002-04-11 Beloit Technologies Inc DELIGNIFICATION OF MEDIUM CONSISTENCY CELLULAR WITH OXYGEN
SE514825C2 (en) 1999-09-16 2001-04-30 Aga Ab Oxygen delignification of cellulose pulp with oxidized white liquor as an alkaline source

Also Published As

Publication number Publication date
SE525773C2 (en) 2005-04-26
FI20041208A (en) 2005-03-25
US7156952B2 (en) 2007-01-02
US20050061460A1 (en) 2005-03-24
FI20041208A0 (en) 2004-09-17
SE0302567L (en) 2005-03-25

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